以下是设备上下文使用的功能。
CancelDC
ChangeDisplaySettings
CreateCompatibleDC
CreateDC
CreateIC
DeleteDC
DeleteObject
DeviceCapabilities
DrawEscape
EnumDisplaySettings
EnumObjects
EnumObjectsProc
GetCurrentObject
GetDC
GetDCEx
GetDCOrgEx
GetDeviceCaps
GetGraphicsMode
GetObject
GetObjectType
GetStockObject
ReleaseDC
ResetDC
RestoreDC
SaveDC
SelectObject
